Could you give some details why soft float on x86 would be useful?

The minimum requirement due to 64bit atomics for Go is Pentium MMX on x86 and thereby all supported chips should have floating point support in hardware.

arm has softfloat support for supported arm versions that do not have hardware support. See https://github.com/golang/go/wiki/GoArm

I'm interested on riscv, as we known, floating point on rsicv chip is optional, So I think If there is a general softfloat implementation(not limited on MIPs), it would be fine.

Go gc does not support RISC-V yet. Once it does soft float for RISC-V if not yet implemented can be considered. Which leaves the question why soft float for platforms that always support hardware float operations (x86 as mentioned) should be supported?

I can see not much demand/use for soft float for e.g. x86 yet and its something that needs to be kept maintained and tested.

Once RISC-V is supported I think it would be better to open a specific issue about soft float support for RISC-V if not present. But I assume that is more likely to trigger an implementation with compiler intrinsics and asm code to have better performance.

For some cross-architecture solutions, the most hacked solution is to translate the source architecture machine language to the target architecture machine language, and if the source machine language uses floating point instructions, it will cause a lot of trouble for the translation. It's my personal interst.

I understand that this is not your current focus, and most people doesn't need it. Thank you for your reply! :)

Thanks for the explanation. I can see how it makes this very special use case a bit easier but I do not think there is sufficient demand to out way the complexity and maintenance burden that would be added.

GCC supports -msoft-float but I do not know if https://golang.org/doc/install/gccgo does.

In the area of blockchain, smart contracts run floating-point computing. If golang can support soft floating-point computing on all platforms, it will be very useful.